A Case Study in Faunalturbation: Delineating the Effects of the Burrowing Pocket Gopher on the Distribution of Archaeological Materials

Abstract

Excavation of a small single-component prehistoric campsite in the coastal southern California foothills has provided evidence concerning the patterns and approximate rates of redistribution of archaeological materials caused by the burrowing pocket gopher, Thomomys bottae. Investigation of bimodal vertical distributions of both historic and prehistoric archaeological materials shows a close correspondence to the burrowing habits of pocket gophers in coastal California. Comparison of these bimodal distributions with a site chronology based upon diagnostic artifacts and C-14 dating suggests that, under certain soil conditions, downward displacement of archaeological materials may occur at rates averaging over 5% per century. The broader implications of the effects of faunalturbation upon the interpretation of archaeological assemblages are briefly discussed.